00001 /*- 00002 * Copyright (c) 2003, 2004 David Young. All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions 00006 * are met: 00007 * 1. Redistributions of source code must retain the above copyright 00008 * notice, this list of conditions and the following disclaimer. 00009 * 2. Redistributions in binary form must reproduce the above copyright 00010 * notice, this list of conditions and the following disclaimer in the 00011 * documentation and/or other materials provided with the distribution. 00012 * 3. The name of David Young may not be used to endorse or promote 00013 * products derived from this software without specific prior 00014 * written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY 00017 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 00018 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00019 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID 00020 * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00021 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00022 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00023 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00024 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00025 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00027 * OF SUCH DAMAGE. 00028 */ 00029 00030 /* 00031 * Modifications to fit into the linux IEEE 802.11 stack, 00032 * Mike Kershaw (dragorn@kismetwireless.net) 00033 */ 00034 00035 #ifndef IEEE80211RADIOTAP_H 00036 #define IEEE80211RADIOTAP_H 00037 00038 #include <stdint.h> 00039 00040 /* Base version of the radiotap packet header data */ 00041 #define PKTHDR_RADIOTAP_VERSION 0 00042 00043 /* A generic radio capture format is desirable. There is one for 00044 * Linux, but it is neither rigidly defined (there were not even 00045 * units given for some fields) nor easily extensible. 00046 * 00047 * I suggest the following extensible radio capture format. It is 00048 * based on a bitmap indicating which fields are present. 00049 * 00050 * I am trying to describe precisely what the application programmer 00051 * should expect in the following, and for that reason I tell the 00052 * units and origin of each measurement (where it applies), or else I 00053 * use sufficiently weaselly language ("is a monotonically nondecreasing 00054 * function of...") that I cannot set false expectations for lawyerly 00055 * readers. 00056 */ 00057 00058 /* The radio capture header precedes the 802.11 header. 00059 * All data in the header is little endian on all platforms. 00060 */ 00061 struct ieee80211_radiotap_header { 00062 uint8_t it_version; /* Version 0. Only increases 00063 * for drastic changes, 00064 * introduction of compatible 00065 * new fields does not count. 00066 */ 00067 uint8_t it_pad; 00068 uint16_t it_len; /* length of the whole 00069 * header in bytes, including 00070 * it_version, it_pad, 00071 * it_len, and data fields. 00072 */ 00073 uint32_t it_present; /* A bitmap telling which 00074 * fields are present. Set bit 31 00075 * (0x80000000) to extend the 00076 * bitmap by another 32 bits. 00077 * Additional extensions are made 00078 * by setting bit 31. 00079 */ 00080 }; 00081 00082 /* Name Data type Units 00083 * ---- --------- ----- 00084 * 00085 * IEEE80211_RADIOTAP_TSFT __le64 microseconds 00086 * 00087 * Value in microseconds of the MAC's 64-bit 802.11 Time 00088 * Synchronization Function timer when the first bit of the 00089 * MPDU arrived at the MAC. For received frames, only. 00090 * 00091 * IEEE80211_RADIOTAP_CHANNEL 2 x uint16_t MHz, bitmap 00092 * 00093 * Tx/Rx frequency in MHz, followed by flags (see below). 00094 * 00095 * IEEE80211_RADIOTAP_FHSS uint16_t see below 00096 * 00097 * For frequency-hopping radios, the hop set (first byte) 00098 * and pattern (second byte). 00099 * 00100 * IEEE80211_RADIOTAP_RATE u8 500kb/s 00101 * 00102 * Tx/Rx data rate 00103 * 00104 * IEEE80211_RADIOTAP_DBM_ANTSIGNAL s8 decibels from 00105 * one milliwatt (dBm) 00106 * 00107 * RF signal power at the antenna, decibel difference from 00108 * one milliwatt. 00109 * 00110 * IEEE80211_RADIOTAP_DBM_ANTNOISE s8 decibels from 00111 * one milliwatt (dBm) 00112 * 00113 * RF noise power at the antenna, decibel difference from one 00114 * milliwatt. 00115 * 00116 * IEEE80211_RADIOTAP_DB_ANTSIGNAL u8 decibel (dB) 00117 * 00118 * RF signal power at the antenna, decibel difference from an 00119 * arbitrary, fixed reference. 00120 * 00121 * IEEE80211_RADIOTAP_DB_ANTNOISE u8 decibel (dB) 00122 * 00123 * RF noise power at the antenna, decibel difference from an 00124 * arbitrary, fixed reference point. 00125 * 00126 * IEEE80211_RADIOTAP_LOCK_QUALITY uint16_t unitless 00127 * 00128 * Quality of Barker code lock. Unitless. Monotonically 00129 * nondecreasing with "better" lock strength. Called "Signal 00130 * Quality" in datasheets. (Is there a standard way to measure 00131 * this?) 00132 * 00133 * IEEE80211_RADIOTAP_TX_ATTENUATION uint16_t unitless 00134 * 00135 * Transmit power expressed as unitless distance from max 00136 * power set at factory calibration. 0 is max power. 00137 * Monotonically nondecreasing with lower power levels. 00138 * 00139 * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t decibels (dB) 00140 * 00141 * Transmit power expressed as decibel distance from max power 00142 * set at factory calibration. 0 is max power. Monotonically 00143 * nondecreasing with lower power levels. 00144 * 00145 * IEEE80211_RADIOTAP_DBM_TX_POWER s8 decibels from 00146 * one milliwatt (dBm) 00147 * 00148 * Transmit power expressed as dBm (decibels from a 1 milliwatt 00149 * reference). This is the absolute power level measured at 00150 * the antenna port. 00151 * 00152 * IEEE80211_RADIOTAP_FLAGS u8 bitmap 00153 * 00154 * Properties of transmitted and received frames. See flags 00155 * defined below. 00156 * 00157 * IEEE80211_RADIOTAP_ANTENNA u8 antenna index 00158 * 00159 * Unitless indication of the Rx/Tx antenna for this packet. 00160 * The first antenna is antenna 0. 00161 * 00162 * IEEE80211_RADIOTAP_RX_FLAGS uint16_t bitmap 00163 * 00164 * Properties of received frames. See flags defined below. 00165 * 00166 * IEEE80211_RADIOTAP_TX_FLAGS uint16_t bitmap 00167 * 00168 * Properties of transmitted frames. See flags defined below. 00169 * 00170 * IEEE80211_RADIOTAP_RTS_RETRIES u8 data 00171 * 00172 * Number of rts retries a transmitted frame used. 00173 * 00174 * IEEE80211_RADIOTAP_DATA_RETRIES u8 data 00175 * 00176 * Number of unicast retries a transmitted frame used. 00177 * 00178 * IEEE80211_RADIOTAP_MCS u8, u8, u8 unitless 00179 * 00180 * Contains a bitmap of known fields/flags, the flags, and 00181 * the MCS index. 00182 * 00183 * IEEE80211_RADIOTAP_AMPDU_STATUS u32, u16, u8, u8 unitlesss 00184 * 00185 * Contains the AMPDU information for the subframe. 00186 */ 00187 enum ieee80211_radiotap_type { 00188 IEEE80211_RADIOTAP_TSFT = 0, 00189 IEEE80211_RADIOTAP_FLAGS = 1, 00190 IEEE80211_RADIOTAP_RATE = 2, 00191 IEEE80211_RADIOTAP_CHANNEL = 3, 00192 IEEE80211_RADIOTAP_FHSS = 4, 00193 IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5, 00194 IEEE80211_RADIOTAP_DBM_ANTNOISE = 6, 00195 IEEE80211_RADIOTAP_LOCK_QUALITY = 7, 00196 IEEE80211_RADIOTAP_TX_ATTENUATION = 8, 00197 IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9, 00198 IEEE80211_RADIOTAP_DBM_TX_POWER = 10, 00199 IEEE80211_RADIOTAP_ANTENNA = 11, 00200 IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12, 00201 IEEE80211_RADIOTAP_DB_ANTNOISE = 13, 00202 IEEE80211_RADIOTAP_RX_FLAGS = 14, 00203 IEEE80211_RADIOTAP_TX_FLAGS = 15, 00204 IEEE80211_RADIOTAP_RTS_RETRIES = 16, 00205 IEEE80211_RADIOTAP_DATA_RETRIES = 17, 00206 00207 IEEE80211_RADIOTAP_MCS = 19, 00208 IEEE80211_RADIOTAP_AMPDU_STATUS = 20, 00209 00210 /* valid in every it_present bitmap, even vendor namespaces */ 00211 IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29, 00212 IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, 00213 IEEE80211_RADIOTAP_EXT = 31 00214 }; 00215 00216 /* Channel flags. */ 00217 #define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */ 00218 #define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */ 00219 #define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */ 00220 #define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */ 00221 #define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */ 00222 #define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */ 00223 #define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */ 00224 #define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */ 00225 00226 /* For IEEE80211_RADIOTAP_FLAGS */ 00227 #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received 00228 * during CFP 00229 */ 00230 #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received 00231 * with short 00232 * preamble 00233 */ 00234 #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received 00235 * with WEP encryption 00236 */ 00237 #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received 00238 * with fragmentation 00239 */ 00240 #define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */ 00241 #define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between 00242 * 802.11 header and payload 00243 * (to 32-bit boundary) 00244 */ 00245 #define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* frame failed FCS check */ 00246 00247 /* For IEEE80211_RADIOTAP_RX_FLAGS */ 00248 #define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002 /* bad PLCP */ 00249 00250 /* For IEEE80211_RADIOTAP_TX_FLAGS */ 00251 #define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive 00252 * retries */ 00253 #define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */ 00254 #define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */ 00255 00256 /* For IEEE80211_RADIOTAP_AMPDU_STATUS */ 00257 #define IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN 0x0001 00258 #define IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN 0x0002 00259 #define IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN 0x0004 00260 #define IEEE80211_RADIOTAP_AMPDU_IS_LAST 0x0008 00261 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR 0x0010 00262 #define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN 0x0020 00263 00264 /* For IEEE80211_RADIOTAP_MCS */ 00265 #define IEEE80211_RADIOTAP_MCS_HAVE_BW 0x01 00266 #define IEEE80211_RADIOTAP_MCS_HAVE_MCS 0x02 00267 #define IEEE80211_RADIOTAP_MCS_HAVE_GI 0x04 00268 #define IEEE80211_RADIOTAP_MCS_HAVE_FMT 0x08 00269 #define IEEE80211_RADIOTAP_MCS_HAVE_FEC 0x10 00270 00271 #define IEEE80211_RADIOTAP_MCS_BW_MASK 0x03 00272 #define IEEE80211_RADIOTAP_MCS_BW_20 0 00273 #define IEEE80211_RADIOTAP_MCS_BW_40 1 00274 #define IEEE80211_RADIOTAP_MCS_BW_20L 2 00275 #define IEEE80211_RADIOTAP_MCS_BW_20U 3 00276 #define IEEE80211_RADIOTAP_MCS_SGI 0x04 00277 #define IEEE80211_RADIOTAP_MCS_FMT_GF 0x08 00278 #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 00279 00280 #endif /* IEEE80211_RADIOTAP_H */